Speaking to The Guardian, bandmates Fergal Lawler and Noel Hogan explained how the singer had confided in them about her mental health battles – after she was diagnosed with bipolar in 2016.

“It was only the last few years that she started talking about psychological problems, because she didn’t know herself”, Lawler explained. “She saw a few different therapists and realised what she had and she started getting treatment for it.”

Despite her battles, Hogan maintains that O’Riordan was on the way to recovery. The band were preparing for an arena tour of China, and O’Riordan was only troubled by a slipped disc in her back.

“She was a lot more herself”, he explained.“Especially last year, when we were rehearsing: you wouldn’t even know, because they had found the right cocktail of whatever it was she needed to be on. There wasn’t even a case of having to ‘work around it’. The hardest thing was her back, because playing live she could not move as freely as she used to.”